A low noise 230 GHz SIS receiver

Details A low noise 230 GHz SIS receiver A low noise 230 GHz SIS receiver

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ijimw...8..609e&link_type=abstract

International Journal of Infrared and Millimeter Waves (ISSN 0195-9271), vol. 8, June 1987, p. 609-625.

Physics

32

Heterojunction Devices, Infrared Detectors, Low Noise, Radio Receivers, Sis (Superconductors), Submillimeter Waves, Superconductors, Bandwidth, Cryogenics, Intermediate Frequency Amplifiers, Mixing Circuits, Noise Temperature, Sidebands, Tuning, Waveguides

Scientific paper

The construction of a 230 GHz superconductor insulator superconductor tunnel junction receiver utilizing a full height rectangular waveguide mixer with two tuning elements, i.e., an E plane and backshort tuner, is reported. Preliminary results indicate that the receiver exhibits a best double side-band response of 114 + or - 15 K (averaged over a 500 MHz IF bandwidth) at a frequency of 228 GHz and at an ambient temperature of approximately 2.4 K. With the exception of a region in the vicinity of 250 GHz, the receiver shows an excellent response over an RF input range of 200 to 290 GHz. Finally, the receiver has been successfully employed on the new Caltech Submillimeter Observatory 10m antenna on Mauna Kea, Hawaii.

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